#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

int main() {
    std::string input;
    std::cin >> input;

    int wrongAnswer = 0;
    std::vector<int> easyNumbers = {101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997};
    int finalNumber = 0;
    int number = 0;

    std::vector<std::string> massive;
    std::string replaceString = input;
    std::replace(replaceString.begin(), replaceString.end(), ' ', '');
    bool bull = std::isalpha(replaceString[0]);
    bool firstZero = input.substr(0, 4) == "zero";

    if (massive.size() > 3 || massive.size() < 3) {
        wrongAnswer = 1;
    } else {
        if (!bull || firstZero) {
            wrongAnswer = 1;
        } else {
            std::string zero = replaceString;
            std::replace(zero.begin(), zero.end(), 'zero', '0');
            std::string one = zero;
            std::replace(one.begin(), one.end(), 'one', '1');
            std::string two = one;
            std::replace(two.begin(), two.end(), 'two', '2');
            std::string three = two;
            std::replace(three.begin(), three.end(), 'three', '3');
            std::string four = three;
            std::replace(four.begin(), four.end(), 'four', '4');
            std::string five = four;
            std::replace(five.begin(), five.end(), 'five', '5');
            std::string six = five;
            std::replace(six.begin(), six.end(), 'six', '6');
            std::string seven = six;
            std::replace(seven.begin(), seven.end(), 'seven', '7');
            std::string eight = seven;
            std::replace(eight.begin(), eight.end(), 'eight', '8');
            std::string nine = eight;
            std::replace(nine.begin(), nine.end(), 'nine', '9');
        }
    }

    if (std::isdigit(nine[0])) {
        number = std::stoi(nine);
    } else {
        wrongAnswer = 1;
    }

    if (number < 100 || number > 999) {
        wrongAnswer = 1;
    }

    finalNumber = *std::min_element(easyNumbers.begin(), easyNumbers.end(), [number](int a, int b) {
        return abs(a - number) < abs(b - number);
    });

    if (wrongAnswer == 1) {
        std::cout << "Wrong input" << std::endl;
    } else {
        std::cout << finalNumber << std::endl;
    }

    return 0;
}